196 Psyche [December 



Limnophila similis is allied to adusta, O.S., but is much darker in 

 coloration, dark brown, not red or yellow. In adusta, the ventral 

 apical appendage of the male hypopygium (see fig. 9) is thick- 

 ened on both sides of the base; in similis (see fig. 8) the thicken- 

 ing is all on one side (cephalic margin in the normal position of 

 rest) . The slender portion of this appendage is much longer than 

 the thickened base in adusta, shorter than this base in similis. 

 The dorsal appendage in adusta is long, slender, thickened on the 

 inner margin of the chitinized tooth, in similis much shorter. The 

 gonapophyses are much smaller in similis than in adusta, but have 

 not yet been studied critically. 



Holotype: male; Johnstown, N. Y. (Hale's Creek) June 10, 

 '10. 



Allotype: female; with the type. 



Para-type: female; Johnstown, N. Y., June 26, '10. 



Swept from vegetation near water; Coll. C. P. Alexander. 



Limnophila noveboracensis sp. nov. 



Male and female. Brownish-yellow; legs, yellow; L. male, 5.2-5.8 mm. Female 

 7-8 mm.; W. male, 6.5 mm.; female, 7-7.5 mm. 



Rostrum, light brown; palpi ^vith numerous long hairs, brown; front and ver- 

 tex yellow with a light gray bloom, producing a silvery effect. Antennae: 1st seg- 

 ment, elongate, cylindrical; 2d, more globular, both segments brown, armed with 

 scattered black hairs; segments of the flagellum becoming gradually more and more 

 elongated and slender, yellowish-brown, with a rather short pubescence and long 

 scattered verticils. Front, vertex and the prolonged occiput, thickly beset with 

 long, brown hairs. 



Thorax: surface opaque; Pronotum, brownish-yellow; the neck with a gray 

 pubescence. Mesothorax: prsescutum, yellowish-brown; a distinct humeral pit 

 on the latero-anterior margin, brownish-black; no distinct thoracic stripes; a 

 conspicuous double dot near the cephalic margin of the prsescutum. Remainder of 

 the mesothoracic and the metathoracic dorsums, light brownish yellow. Pleurae 

 pale brownish-yellow. Halteres pale, the distal portion of the knob darker. Legs: 

 coxae yellow; femora and tibiae pale yellow, the extreme tips barely darker; tarsal 

 segments excepting the metatarsus, yellowish-brown. 



Abdomen hairy, brownish above, paler, yellowish, beneath; genitalia, light. 



Wings hyaline, or nearly so; stigma indistinct; veins pale brown. Venation: 

 Sc long, extending almost to the inner margin of cell Rs. Sci about twice the length 

 of Sc2. R long, the cross-vein r far from its tip, at least twice its own length. Rs 

 long, gently arcuated at its origin; petiole of cell R2, short, from one-fourth to two- 

 fifths as long as vein R2; Rs long, sinuate; R4 + 6 between Rs and the cross-vein 

 r-m, longer than this cross-vein. M3 beyond the cell 1st M2, longer than this cell. 



